<!doctype html>
<html>
    <head>
        <title></title>
        <meta charset="utf-8" />
        <style>
         div {
             width: 200px;
             height: 100px;
             padding: 150px 50px;
             border: solid #f00;
             border-width: 10px 5px;
             margin: 50px 100px;
         }
        </style>
    </head>
    <body>
        <div>盒模型的计算方式</div>
    </body>
</html>
